What is the closest parallel in animal structural levels of complexity to the branches, buds, flowers, seeds, and fruits of flowering plants?
A. Subcellular, specialized organelles.
B. Bone cells, muscle cells, skin cells, nerve cells.
C. Muscle tissue, connective tissue, nervous tissue, epithelial tissue.
D. Heart, lungs, stomach, kidney, reproductive organs.
E. Digestive system, reproductive system, skeletal system.
E. Digestive system, reproductive system, skeletal system.
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The prokaryotic transport system that involves a substrate-binding protein, a membrane-integrated transporter, and an ATP-hydrolyzing protein is
A) the ABC transport system. B) group translocation. C) symport. D) simple transport.
Given the following plasmid, what are the sizes of the fragments you would expect from an XhoI digest?
What will be an ideal response?
When renin is released:
A) the conversion of angiotensin I to angiotensin II is inhibited, which facilitates excretion of sodium via the kidneys. B) the lungs convert the plasma protein angiotensinogen to angiotensin I, which dilates the renal blood vessels and increases kidney function. C) the pancreatic alpha cells secrete the hormone glucagon, which facilitates the conversion of glycogen to glucose in the liver. D) the angiotensin-converting enzyme (ACE) converts angiotensin I to angiotensin II, which stimulates sodium resorption by the renal tubules
An ________ may arise when three sperm cells are involved in fertilization of a single egg
A) aneuploidy B) allotetraploid C) allotriploid D) autotetraploid E) autotriploid